<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>${projectTitle }-500</title>
</head>
<body>
<div style="text-align: center;margin:300px auto ;">
    <h1 style="font-size: 24px;">500 错误，请联系管理员</h1>
    <h2 style="font-size: 20px;"><a href="javascript:history.go(-1)" style="color:blue">返回</a></h2>
</div>
</body>
</html>
